Steam-shovel



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G. HOLMES. STEAM SHOVEL. Y

Patented May 15, 1894.

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G. HOLMES.

Y STEAM SHOVEL. No.519,955. Patented May 15,1894.

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UNITED STATES PATENT OFFICE.

GRANT HOLMES, OF DANVILLE, ILLINOIS.

STEAM-SHOVEL.

SPECIFICATION forming part of Letters Patent No. 519,955, dated May 15,1894.

Application filed January 29, 1894- Serial llo. 4981421- (NO mOdBL) Toall whom it may concern.-

Be it known that I, GRANT HOLMES, of Dany ville, in the county ofVermilion and State of Illinois, have invented certain-new and usefulImprovements in Steam-Shovels, of which the following is aspecification.

This invention relates to steam shovels, dredgers and the like; it isembodied partly in the dipper construction, partly in the jack braceconstruction, and partly in the construction and arrangement of the masthead and pulleys therein.

It is the object of the dipper improvement to strengthen the nose pieceand provide means for readily attaching and detaching the same.

It is the object of the jack brace improvement to provide strong andeffective lateral braces which may be adjusted, and raised fortransportation, either by power or by hand. And it is the object of themast head improvement to lessen the number of pulleys, ordinarily usedto guide the hoisting chain, without interfering with the freedom of theSwing of the crane.

In the drawings forming part of this speciication Figure 1 is a sideelevation of a steam shovel embodying the different features of myinvention. Fig. 2 is a central vertical section lengthwise through themast head. Fig. 3 is a front elevation of the mast head. Fig. 4 is adiagram illustrating the swing of the principal pulley of the mast head.Fig. 5 is a central vertical section from front to back through thedipper. Fig. 6 is a perspective representation of the jack braces. Fig.7 is a detached representation of the jack screw, with its sheave, itsclutch and its capstan head. Fig. 8 is a horizontal View of 4o Fig. 2.

- The car frame 1 is of any suitable construction, and suitably braced.The brace 2 is secured to the top of the car frame and the top of thejack frame. front end of the car frame, and it carries on its projectingend the mast head 3. The front end of the mast head is rounded, withrelation to the vertical, and it is provided with an arc-formed mouth,or slot 4, through which the hoistingchain 13 travels and swings. Asheave block 5 is pivoted at its lower end on pin 9, which hashorizontal bearings in It extends beyond the` the lower, front end ofthe masthead, and eX- tends in line with the length of the head. Thesheave 11 is carried by the swinging block 5, and it is in substantialalignment with the vertical pivot of the crane. Vertical pin 10 issecured in the front end of the mast head and it projects upward beyondthe same. Block 6 pivots on the upper end of pin lO, being held thereonby collar 7, and it provides a point of connection for the connectingbars 8 of the crane suspending brace 14. Pulley 12 is mounted in therear end of the mast head between bearings sufficiently far apart topermit sliding motion in the pulley, and the chain 13 runs over pulley12 and under pulley 11. As the crane swings from side to side, or fromcenter to side, in act of loading and unloading the dipper the pulley 11swings freely on the horizontal pivot, as indicated in Fig. 4, the chainfollows the curved slot, and the pulley 12 moves from side to side,sliding in its bearings, in order to fully accommodate the motion of thechain in the swinging pulley.

The boom of the crane is shown at 15 and the dipper handle at 16. Thedipper is constructed in the customary, or any desirable manner, exceptfor the peculiarities hereinafter specified, and it' is connected withthe handle as shown or in the usual manner. The body ofv the dipper isshown at 17, a band encompassing the upper edge of the dipper is shownat 18, the nose piece at 19, and the teeth at 20. The teeth have thecustomary external ribs, as 21, 22, which engage the outer surfaces ofthe nose piece and the dipper body, and are otherwise constructed in thecustomary manner. A plate, as 23, is bent to it the inner front portionof the dipper,"it is riveted iirmly to the upper edge of the body of thedipper, and it is recessed to receive the inner end of the nose piece. Abolt, 24, eX- tends through a hole .formed partly in the nose piece andpartly in the contiguous vertical wall of plate 23, and, with theassistance of the tooth bolts, holds the nose piece in operativeposition. The band 18 greatly strengthens the dipper, at the point wheregreatest strength is needed, and the plate 23, constructed as specified,enables the nose piece to IOO be readily detached for the purpose ofsharpbars 25 which rise from the floor at one side of the front end ofthe car, extend upward to the top of the car frame, run across the topof the car and extend down to the iioor on the opposite side; therebyproviding a strong support for the jack braces, and for the mast head..Jack screws 26 have bearings in the car frame between the parallel bars25, and such screws have loose pulleys 31 at points slightly above theoor of the car, and sliding clutches 32 abovethe loose pulleys, suchclutches being splined on the screws and provided with operating leversas 39, in Fig. 7; and in addition to said pulleys and clutches Ythelower ends of the screws are provided with capstan heads, as seen at 37in Fig. 7, whereby the bar 38 may be used by hand to rotate the screw.Nuts 27 are mounted on the jack screws and guided between the parallelbars. A brace bar 28 is hinged in each nut, a tie brace 31 is hinged toa bolster under the car frame, the brace bar and the tie brace arehinged together at their swinging ends,

through the intervention of a casting 29, and

such casting has a ball at its lower end which its in a socket in thebearing block 30. The bearing blocks are adjusted, or raised fortransportation, by. turning the screws in the nuts, and this is done,except in an emergency, by applying power from the engine to the pulleysand throwing the clutches, either or both, in engagement with thepulleys. The power may be applied in various ways, as for instance, thechain 35, which is the chain that operates the dipper, may be geared torun in opposite directions under the manipulation of the operator, andmay be diverted through the double pulleys 33 and 34 to the pulleys ofthe jack screws.

The capstan heads on the jack screws bear upwardv against the bottom ofthe car and all vertical strain'of the braces is thrown onto the headsof the jack screws, to the relief of the parallel guide bars and otherparts of the frame.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. Acrane mast head havinga single sheave blockapproximately in line with the vertical pivot of the crane and swung atits lower end on an approximately horizontal pivot, substantially as setforth.

2Q A crane mast head having an arc formed mouth, or slot, for thepassage of the chain and provided with a single sheave blockapproximately in line with the vertical pivot of the crane and swung atits lower end on an approximately horizontal pivot substantially as setforth.

3. A crane mast head rounded vertically on its forward end and having anarc-formed mouth, or slot, for the passage of the chain, and a singlesheave block in the mast head approximately in line with the verticalpivot of the crane and swung at its lower end on an approximatelyhorizontal pivot, substantially as set forth.v

4. A crane masthead having asingle sheave block approximately in linewith the vertical pivot of the crane and swung at its lower end on anapproximately horizontal pivot, and also having a sliding sheave to therear of the swinging sheave block substantially as sct forth.

5. A crane mast head having a sheave block approximately in line withthe vertical pivot of the crane and swung at its lower end on anapproximately horizontal pivot, and a verl tical pin projecting upwardfrom the mast head and forming a bearing for the suspension rod of thecrane boom, substantially as set forth.

6. A jack or brace for steam shovels, and similar machines, such bracecomprising a jack screw having bearings in the car frame, a nut on thejack screw guided against turning, a brace bar hinged to the nut, and atie brace hinged to the lower portion of a side of the car, the bracebar and the tie brace being hinged togther at their swinging ends andcon nected with a'bearing block, substantially as set forth.

7. A jack or brace for steam shovels, and similar machines, consistingin the combination of a jack screw having bearings in the car frame, anut on the jack screw guided against turning, a brace bar hinged to thenut, a tie brace hinged to the lower portion of a side of the car andalso hinged to the brace bar, a bearing block connected with the bracebar and tie brace at or near the conjunction thereof, and aloose sheaveand sliding clutch on the jack screw enabling such screw to be turned bya chain of the machine,

` substantially as set forth.

8. A jack screw for adjusting the brace bars of steam shovels, ,and likemachines, such screw having bearings in the car frame and provided witha clutch sheave and a capstan head, whereby it may be operated either bypower or by hand, substantially as set forth.

9. In jacks or braces for steam shovels, and similar machines, thecombination of a guide frame composed of parallel bars extended from thefloor at one side of the car upward, across and down to the iioor on theopposite side, a jack screw between the vertical bars on each side,a nuton each jack screw guided between the parallel bars, a brace bar hingedto each nut, and a tie brace hinged tothe lower edge of each side of thecar, the brace bars and the tie braces being hinged together at theirswinging ends and connected with a bearing block, substantially as setforth.

10. In a dipper for steam shovels, the combination of a dipper; a nosepiece; a plate recessed to receive the nose piece, extended around theinner, upper, front portion of the dipper and secured tlrmlyin place;and a bolt extending Vthrough a hole formed partly in the nose piece andpartly in a coinciding ver-1 TOO IIO

tical wall of the plate; whereby the nose piece is secured to the dipperin a readily detachable manner, substantially as set forth.

1l. In a dipper for steam shovels, the combination of a dipper; a nosepiece; aband extending around the upper edge of the dippcr; a platesecured rmly to the inner, upper, front portion of the clipper, andrecessed to receive the nose piece; and a bolt extending through a holeformed partly in the nose piece and partly in a coinciding wall of theplate, substantially as set forth.

I2. A jack or brace for steam shovels, and like machines, consisting inthe combination of a jack screw extended through the bottom of the carframe and provided with a head on its lower end bearing against thebottom of the car, a nut on the jack screw above the Hoor of thecar,such nut being guided against turning, and a brace extendingobliquely downward and outward from the nut, whereby all vertical strainof the brace is exerted on the head of the jack screw and against thebottom of the car, substantially as set forth.

In testimony whereof I sign my name in the 2 5 presence of twosubscribing witnesses.

GRANT HOLMES. Attest:

E. S. MCDONALD, SAMUEL TROTTER.

